package com.atguigu.gulimall.product.service.impl;

import com.alibaba.fastjson.TypeReference;
import com.atguigu.common.utils.R;
import com.atguigu.gulimall.product.entity.SkuImagesEntity;
import com.atguigu.gulimall.product.feign.SeckillFeignService;
import com.atguigu.gulimall.product.service.*;
import com.atguigu.gulimall.product.vo.SeckillInfoVo;
import com.atguigu.gulimall.product.vo.SkuItemVo;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.math.BigDecimal;
import java.util.List;
import java.util.Map;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.ThreadPoolExecutor;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.atguigu.common.utils.PageUtils;
import com.atguigu.common.utils.Query;

import com.atguigu.gulimall.product.dao.SkuInfoDao;
import com.atguigu.gulimall.product.entity.SkuInfoEntity;
import org.springframework.util.StringUtils;


@Service("skuInfoService")
public class SkuInfoServiceImpl extends ServiceImpl<SkuInfoDao, SkuInfoEntity> implements SkuInfoService {

    @Autowired
    SkuImagesService skuImagesService;
    @Autowired
    SpuInfoDescService spuInfoDescService;
    @Autowired
    AttrGroupService attrGroupService;
    @Autowired
    SkuSaleAttrValueService saleAttrValueService;
    @Autowired
    ThreadPoolExecutor executor;
    @Autowired
    SeckillFeignService seckillFeignService;

    @Override
    public PageUtils queryPage(Map<String, Object> params) {
        IPage<SkuInfoEntity> page = this.page(
                new Query<SkuInfoEntity>().getPage(params),
                new QueryWrapper<SkuInfoEntity>()
        );

        return new PageUtils(page);
    }

    @Override
    public PageUtils queryPageByCondition(Map<String, Object> params) {
        QueryWrapper<SkuInfoEntity> queryWrapper = new QueryWrapper<>();
        /**
         * key:
         * catelogId: 0
         * brandId: 0
         * min: 0
         * max: 0
         */
        String key = (String) params.get("key");
        if(!StringUtils.isEmpty(key)){
            queryWrapper.and((wrapper)->{
                wrapper.eq("sku_id",key).or().like("sku_name",key);
            });
        }

        String catelogId = (String) params.get("catelogId");
        if(!StringUtils.isEmpty(catelogId)&&!"0".equalsIgnoreCase(catelogId)){

            queryWrapper.eq("catalog_id",catelogId);
        }

        String brandId = (String) params.get("brandId");
        if(!StringUtils.isEmpty(brandId)&&!"0".equalsIgnoreCase(catelogId)){
            queryWrapper.eq("brand_id",brandId);
        }

        String min = (String) params.get("min");
        if(!StringUtils.isEmpty(min)){
            queryWrapper.ge("price",min);
        }

        String max = (String) params.get("max");
        if(!StringUtils.isEmpty(max)  ){
            try{
                BigDecimal bigDecimal = new BigDecimal(max);
                if(bigDecimal.compareTo(new BigDecimal("0"))==1){
                    queryWrapper.le("price",max);
                }
            }catch (Exception e){
            }
        }

        IPage<SkuInfoEntity> page = this.page(
                new Query<SkuInfoEntity>().getPage(params),
                queryWrapper
        );
        return new PageUtils(page);
    }

    @Override
    public List<SkuInfoEntity> getSkusBySpuId(Long spuId) {
        List<SkuInfoEntity> list = this.list(new QueryWrapper<SkuInfoEntity>().eq("spu_id",spuId));
        return list;
    }

    @Override
    public void saveSkuInfo(SkuInfoEntity skuInfoEntity) {
        this.baseMapper.insert(skuInfoEntity);
    }

    @Override
    public SkuItemVo item(Long skuId) {
        SkuItemVo vo=new SkuItemVo();

        CompletableFuture<SkuInfoEntity> infoFuture = CompletableFuture.supplyAsync(() -> {
            //1.sku基本信息
            SkuInfoEntity info = getById(skuId);
            vo.setInfo(info);
            return info;
        }, executor);
        CompletableFuture<Void> saleFuture = infoFuture.thenAcceptAsync((res) -> {
            //3.spu销售属性
            vo.setSaleAttrs(saleAttrValueService.getSaleAttrsBySpuId(res.getSpuId()));
        }, executor);
        CompletableFuture<Void> despFuture = infoFuture.thenAcceptAsync((res) -> {
            //4.spu介绍
            vo.setDesp(spuInfoDescService.getById(res.getSpuId()));
        }, executor);
        CompletableFuture<Void> groupFutrue = infoFuture.thenAcceptAsync((res) -> {
            //5.spu规格参数
            vo.setGroupAttrs(attrGroupService.getAttrGroupWithAttrsBySpuId(res.getSpuId(), res.getCatalogId()));
        }, executor);
        //不需要等待第一步
        CompletableFuture<Void> imageFuture = CompletableFuture.runAsync(() -> {
            //2.sku图片信息
            vo.setImages(skuImagesService.getImagesBySkuId(skuId));
        }, executor);
        CompletableFuture<Void> seckillFuture = CompletableFuture.runAsync(() -> {
            //查询当前sku是否参与秒杀
            R r = seckillFeignService.getSkuSeckillInfo(skuId);
            if(r.getCode()==0){
                SeckillInfoVo seckillInfoVo=(SeckillInfoVo)r.getData(new TypeReference<SeckillInfoVo>(){});
                vo.setSeckillInfo(seckillInfoVo);
            }
        }, executor);


        try {
            CompletableFuture.allOf(saleFuture,despFuture,groupFutrue,imageFuture,seckillFuture).get();
        } catch (InterruptedException e) {
            e.printStackTrace();
        } catch (ExecutionException e) {
            e.printStackTrace();
        }
        return vo;
    }
}
